[Numpy-discussion] when did column_stack become C-contiguous?

[josef.pktd at gmail.com]

>>> np.column_stack((np.ones(10), np.ones(10))).flags
  C_CONTIGUOUS : True
  F_CONTIGUOUS : False

>>> np.__version__
'1.9.2rc1'


on my notebook which has numpy 1.6.1 it is f_contiguous


I was just trying to optimize a loop over variable adjustment in
regression, and found out that we lost fortran contiguity.

I always thought column_stack is for fortran usage (linalg)

What's the alternative?
column_stack was one of my favorite commands, and I always assumed we have
in statsmodels the right memory layout to call the linalg libraries.

("assumed" means we don't have timing nor unit tests for it.)

Josef
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